<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <!--        添加juese按钮-->
        <el-col :span="5">
          <el-button type="primary"  @click="showAddCateDialog">添加商品</el-button>
        </el-col>
      </el-row>
      <!--    biao-->
      <tree-table :data="catelist" :expand-type="false" :selection-type="false" show-index class="treetable" index-text="#" stripe border :show-row-hover="false" :columns="columns" >
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen"></i>
          <i class="el-icon-error" v-else style="color: lightcoral"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="warning" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="success" v-else>三级</el-tag>
        </template>
        <template slot="opt" >
          <el-button type="primary" icon="el-icon-edit" size="mini"  >编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini"  >删除</el-button>
        </template>
      </tree-table>
      <!--    fenye-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
      <!--    添加对话框-->
      <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" @close="addCateDialogClosed">
        <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>

          <el-form-item label="父级分类:">
            <!-- options 用来指定数据源 -->
            <!-- props 用来指定配置对象 -->
            <el-cascader
              v-model="selectdKeys"
              :options="parentCateList"
              @change="parentCateChanged"
              :props="{
              expandTrigger: 'hover',
              ...cascaderProps,
              checkStrictly: 'true'
            }"
              clearable>
            </el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  name: 'Categories',
  data () {
    return {
      catelist: [],
      total: 0,
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 3
      },
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      // 添加分类的表单数据对象
      addCateForm: {
        // 将要添加分类的名称
        cat_name: '',
        // 父级分类的ID
        cat_pid: 0,
        // 分类层级,默认要添加的是1级分类
        cat_level: 0
      },
      // 添加分类表单的验证规则对象
      addCateFormRules: {
        cat_name: [{
          required: true,
          message: '请输入分类名称',
          trigger: 'blur'
        }]
      },
      // 父级分类的列表
      parentCateList: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 选中的父级分类的id数组
      selectdKeys: [],
      // 编辑对话框的显示和隐藏
      editCateDialogVisbel: false,
      editCate: {},
      editCateRules: {
        cat_name: [{
          required: true,
          message: '请输入要修改的信息',
          trigger: 'blur'
        }]
      },
      editCateId: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        this.$message.error('获取用户列表失败')
      } else {
        this.$message.success('获取用户列表成功')
        this.catelist = res.data.result
        this.total = res.data.total
      }
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
      console.log(newSize)
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
      console.log(newPage)
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类数据失败!')
      }
      // console.log(res.data)
      this.$message.success('获取父级分类数据成功!')
      this.parentCateList = res.data
    },
    // 选中向发生变化触发
    parentCateChanged () {
      console.log(this.selectdKeys)
      // 如果 selectdKeys 数组中的length大于0证明选中父级分类
      // 反之,就说明没有选中任何父级分类
      if (this.selectdKeys.length > 0) {
        // 父级分类的id
        this.addCateForm.cat_pid = this.selectdKeys[this.selectdKeys.length - 1]
        // 为当前分类的等级赋值
        this.addCateForm.cat_level = this.selectdKeys.length
      } else {
        // 父级分类的id
        this.addCateForm.cat_pid = 0
        // 为当前分类的等级赋值
        this.addCateForm.cat_level = 0
      }
    },
    // 点击按钮添加新的分类
    addCate () {
      console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败!')
        }
        this.$message.success('添加分类成功!')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 关闭对话框事件,重置表单数据
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectdKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    }
  }
}
</script>

<style lang="less" scoped>
.treetable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
